Auto-creation of threads?

[Wired1]

function build_new_post($type = 'thread', $foruminfo, $threadinfo, $parentid, &$post, &$errors)

Ok, I found it and I've been looking into the arguments, i.e. $foruminfo. It looks like it's an array. However, I can't find an easy list on all of the values that I need to pass to it. Same goes for $threadinfo. &$post I think I've got down as the description of the function details it. Somewhat worried about

	$post['posthash'] = trim($post['posthash']);

but I'll leave them for later.

$foruminfo = verify_id('forum', $_REQUEST['forumid'], 1, 1);

I did find this snippet pertaining to $foruminfo, but I've seen other array cells referenced throughout the code.